Hydraulic grease dispensing system



NOV. l, 1932. l A, BlzzARRl 1,885,220

HYDRAULIC GREASE DISPENSING SYSTEM Filed Aug. 13. 1951 Patented Nov. 1v, 1932 PATENr-f,OFFICE ANTHONxBIZZARRI, or NEW'YORK, Near. v

HYDRAULIC GREA'sEnIsPENsnm sYsrrEi/i Application mea August 13, iaeifseriailiioi. 556,755..

1 lMy vpresent invention `relates to` f grease dispensing devices, and more'particularly, to'sucli devices as may be actuated by hydrai'ilicpressure; I have foundthat when 5 handling `.heavy greases such as'thosefused for the` lubrication of dierential mechanisms of motor vehicles, it vis necessary to employ considerable pressure to expel the heavy grease from itsrcontainer and inject.

10 the same into the dierential casing. However, by. means ofthe present invention,'I provide hydraulically actuated means wherey the ejection of the heavy greaseis readily.

accomplished. VIn the accompanying 4speci- '15 ic'ation I slialldescribe, `and in the annexed drawing show .an illustrative embodiment of the .hydraulically actuated grease 4dispensing devices of .the present invention. It is, however, to be clearly-understood that herein shown and described for purposes of illustration only.

It is the mainobject ofv myv present inven-V 25 tion `toiprovide devices ofthe general charsaid illustrative embodiment of the presentA invention, a part thereof 'being` diagram# matic.' n j Referring now more in .detailto' .the aforesaid illustrative embodiment ofthe hydraulically actuated. grease-dispensing devices of 45 the present invention, .and lwithparticular l do not wish to `be limited to theexact de-rv tails of the aforesaid illustrative embodiment reference to the drawing rilliistratingc the saine, 'thenumeral V1() generally designates ai'ielectric motor, on theshaft 11 of which is secured an eccentric-l camV x12. Associated withthe motor 11, is an eccentric housing 13 with which kthere may 'be rintegrallyformed a pairofcylinders 14 lan`d15. It will be noted'that the cylinders 14 and 15 are oppositely disposed,` so that when. the eccentric 12 is rotated, the plungers vwithwhch the .7.

cylinders 14 vand l'ar'e provided are alternately actuated, .the .arrangement being ysuch that while onepumpjis intaking'tlie other is i dispensing, and vice versa. f Y

`"The Vcylinder 14 has Ioperable ,thereinl a plunger 16, the lower end of` which is main'- tained at alltimes in contact with the eccentric12', within the` housing 13, vbymeansl i ,of an expansion springVV 17, This cylinder is also provided,withV lan inlet 18fforheavy grease, a check valve 19, and an outlet20" for the heavy grease .referred to.v TheV outlet 20 is connected to a: flexible hosej'21, or any other grease conveyingmeans, onthe outer end fof which` a fitting, or adapter22 H may `be secured,'this hose being adaptedto conveythe grease ejected by the pump plunger 16,130 whereverthe' greaseis 'to be used,

for example, in'lubiticatiiig'the differential P mechanism of a motor vehicle; 1

The cylinder 15 is provided 'with a plunger '23,' an inlet 24 check v alve2v5, an outlet126. yThe plunger 23 is always maintained in con# tact with fthe eccentric 12 withiiithe housing 13, by. means ofthe expansion springl 27. f

Thisl ycompletes the description of the pump mechanism constituting part ofthe aforesaidv i illustrative embodimentI of the present inventiom-and I-shall now describe connection with the aforesaid :illustrative embodiment of-thepresent invention. Such storing means may consistofa container .128

the-storing means, vwhich 'I prefer to use in '35 in the formof agcylinder, said'containerhave y ing fnear fthe lower end thereof Vaninlet 29, `9

and adjacent the upper end thereof an outlet 30. Surrounding the container 28, I provide an annular chamber 31, this chamber communicating with the container 28 by way of the port 32 controlled by a needle valve 33, the outer end of which is provided with a lrnurled knob 34. This port is normally closed. The cylindrical container 28 is further in communication with the annular container 31 by means of the check valve 35, the operating pressure of which is controlled by the set screw 36. The container 28 is receptive of heavy grease such as that used for the lubrication of differential mechanism of motor vehicles, and the annular chamber or res` ervoir 31 is adapted to` sto-re a light, oil or other fluidy intended to be utilized to develop hydraulic pressure for the ejection of v the heavy grease to be contained in the cylindrical container 28." Operable in the cylinder 28 is a piston 37, said piston being normally retained in the lower portion of the cylindrical container 28 lby means of atension spring 38. This completes the description of the storing means which T prefer to use for the aforesaid illustrative embodiment of the present invention, and I shall now describe the means for controlling the flow of the grease and the hydraulic fluid which I prefer to utilize in the present invention. Such means may consist of a cylinder 39 in which there may be'operable a cylindrical valve generally designated by the reference character 40. Such valve preferably consists of a cylindrical rod having reduced portions 41 and 42 so spaced as to present three valve portions 43, 44 and 45, the diameters of which are such as to snugly fit in the cylinders 39. The valve 40 is normally maintained in such a position as to close the outlets and inlets of the cylinder 39, which will later be described, by means of an ex pan'sion spring 46. The cylinder 39 is provided with an inlet 47 connected by a pipe 48 with the outlet 30 of the container 28. Di rectly opposite the inlet 47 the cylinder 39 is provided with an outlet 49 by a pipe 50 with the inlet 18 of the cylinder 14. An additional inlet 51, with which the cylinder 39 is provided, is connected by a pipe 52 with an outlet 53 formed in the annular chamber or reservoir 31, and oppositely disposed to. the inlet 51, the cylinder 39 is provided with an outlet 54 connected by a pipe 55 with the inlet 24 ofthe cylinder 15. Finally, the outlet 26 of the cylinder 15 is connected bya pipe 56 with the inlet 29 of the container 28.

The valve 40 is provided with a rod 57, the outer end of which is secured to a Bowdin cable 58, the opposite end of which is secured to a bell crank lever 59, pivoted at 60 on the flexible hose 21, the arrangement being such that after the adapter 22, which is carried by the hose has been connected with the fitting to be lubricated, the lever 59 may be dei 15 by way of the outlet 26,

lLacasse As already stated, prior to using the device, the piston 37 is retained in the lower portion of the cylinder 28 by the tension spring 38. Thecylinder 28 is loaded by removing the upper portion 28 thereof (here shown as being diagrammatic) and placing the heavy grease inthe sameuntil it comes to rest in the upper surface of the piston 37. Thereafter the upper end of the cylinder 28 is replaced andthe. device is then loaded and ready for use. ItV will be noted that prior to actual use, valve portion 43 closes'the communication between the pipes 57 and 50, and the valve portion 44 closes the connection between the pipes 52 and 55. It is intended that the motor 10 be in operation at alltimes,

it being believed to be unnecessary to here show that the motor is, of course, connected with the source of electrical current. With the motor running, let us assume that it is desired to lubricate the diiferentialmechanism or any other apparatus requiringl heavy grease lubrication. The adapter 22 is connected with the fittingwith which the differential casing or the like is usually provided. The motor, beingin operation, through the eccentric 12, f will be operating the pump plungers 16 and 23, although no grease or oil will be pumped because. of the position of the valve portions 43 and 44. As soon as the lever 59 is depressed, the valve 40 will be moved againstthe action of the spring 46 so that the valve portions 43 and 44 will no longer respectively close the communications between the pipes 57 and 50, and 52 and 55, so that the light oil from the reservoir 31 will pass out of the same by way'of the outlet 53,.pipe 52, inlet 51, outlet 54, pipe 55 and inlet 24 into the cylinder 15. From this point, the plunger 23 will pump the light oil past the check valve 25 out of the cylinder pipe 56 and `inlet 29 into the lower end ofthe container 28 beneath the pistons 37. As soon as suflicient pressure is built up beneath the piston 37,

said piston will be moved upwardly against l the action of thev spring 38, to force the heavy grease contained in the cylindrical container 28 out of the same by way of the outlet 30, pipe 48, inlet 47, outlet 49, pipe 50 and inlet 18 intovthe grease pump 14. From this point, the plunger 16 will force the grease past the check valve `19, and out of the cylinder 14 by way of the outlet 20, flexible hose 21, adapter 22, and into Vthe fitting (not show-n) with which the apparatus being lubrica'ted: is provided. As'soonlfas the cation completed, all thatneed ybe vdone to 'stop the flow is to release theslever 59. This will virlj, M j..

v Should the pressure in the cylinder 28ube- Vcomet-oo great, the excess Voil inthe lower end 'of ythe container 28, beneath 'the' piston?, will 'passthe' check valve and be returned to-the reservoirv 31. After'all of vthe/.grease has been `.expelled fromthe cylindrical container 28, the needle valve 33 may beopened to permit the oil in the container 28 beneath out of said containeran-'dbackv into 'the lreserfvvoir 31.V Of course, as the oil leaves 'theicontainer 28, the piston 37 `will be returned byV the action of the spring 38,to itsnormaly low,-V er position. Y

This completes the description of the mode of operation and use of the aforesaid illustra-- tive embodiment of `the grease dispensingdef vices of thepresent invention,and it will be noted from all of the foregoing that thev devices of the present inventionfare simple in construction, easy and economical vto ,fabricate and assemble, vand admirably adapted to perform their intended functions. Other superiorities and advantages of the devices of the present invention will readily occur to those skilled in the art to which the inventionrelates. i o y f lVhat I vclaim fas my invention is: j,

1.A hydraulic grease dispensing device, comprising", a lgrease-containing, reservoir, a

present 'piston operable in Vsaid grease-containing res# ervoir, `a huid-containing chamber, i means communicating with said grease-'containing reservoir to eject the grease therefrom under pressure, means communicating'with 'said huid-containing chamber to force Vthe fluid 'therein beneath the piston in said grease-con'- taining reservoir, and means to control' the communications between said grease-containing reservoir and said iirst named means, and

`- said fluid-containing chamber and said second named means. f

2. A hydraulic grease dispensing device,

comprising a grease-containing reservoir, a piston operable in said grease-containing res-L ervoir, aL Huid-containing chamber, pumping means communicating with said grease-containing reservoir to eject the grease-therefrom under pressure, means communicating with said huid-,containing chamber `to force' the iiuid thereinbeneath the piston in said greasecontaining reservoir, andmeans to control the communications between'said grease-containfA ing reservoir and said first namedmeaiis, and said fluid-containing rchamber and said second named ineans.` f

close the valve portions'l and 44', sok Athat although themotor 10,' andthe pump plunger's 156. and Q3 will continuejto operate, `:no further` grease .for hydraulic fluid will be withdrawn fromV the container 28 and reser-VV tlie piston 137v to pass by wayy of the port 32V dispensingiv comprising a' grease-containing reservoir, a pistonV operable in saidy greasecontaining` reservoir, and means to control the "communica,-

vtions between' ,said :grease-'containing reservoir .and said first' namedj'means, and saidV iuidicontaining .chamberV andi said fsecond 'named means.

j L1A hydraulic grease dispensing device, f

comprising a grease-containing reservQr, a pistonoperable in said grease-containing refsvervoir, a v-fluidecontaining chamber, vmeans communicating with 'said greasecontaining reservoir to eject the grease therefrom' under pressure,` pumping means communi(ating with saidl fljuidcontaining lchamber Ato ,force the'fluid Ytherein beneath' the pistoniin-said Y grease-containing reservoir, and means to control the communications between said greasecontaining reservoir and said first' named meansa'nd said fluid-containing chamber and said second nam-,ed means.

"5.A hydraulic grease[dispensingdevice, r

comprising al grease-containing reservoir, a piston Operable in said grease-containing reservoir, a i'luid'containing chamber, means communicating with said grease-containing reservoir to eject the grease therefrom under pressure,'an eccentrically actuated fluid pump communicating lvvsfifthfsaid fluid-.containing chamber tioforcethe'fiuid therein beneath the Y .y

piston insaid grease-containingreservoir, and-means to control the communications be'- tween said grease'containing..reservoir and said first named means, and said iiuid-,containingffchamber and said second named means.

6; A'hydraulic grease'y dispensing device, comprising a grease-containing*.reservoir, a piston operable in said grease-containing reservoir, a fluid-containing chamber, pumping meanscoinmunicating with said greasecontaining reservoir-to ej ectthegrease therefrom under pressure, pumping means communicat ing with said. fluid-containing chamber to force Y.the fluid therein beneath the piston in saidgrease-containing reservoir, and means Lto control the communications between said grease-containing reservoirr and said first named means,` and ,saidluid-containing chamber and saidvs'econdnamed means. v

7; A hydraulic grease comprising a: grease-containing reservoir, a

piston operable in said grease-containing res?V Yervoii", a .fluid-containing ',chamber, .an ec- Vceiitrically actuated grease pump communieating with said grease-containing 'reservoir to eject the grease therefrom under pressure, q Y v pumping'.means-communicating with vsaid dispensing device,

fluid-co'l'ataining chamber to force the fluid therein beneath the piston in said grease-containing reservoir, and means to control the communications between said grease-containing reservoir and said firstfnamed means, and said fluid-*containing chamber in said second named means. v

8. Ahydraulic grease dispensing device, comprising a grease-containing reservoir,l a

piston operable in said grease-containingres,-`

9t A hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston'operable in said grease-containing reservoir, a fluid-containing chamber, an eccentrically actuated greaseV pump communicatingwith said grease-containing reservoir to eject the grease therefrom under pressure, an eccentrically actuated iiuid pump communicating with said fluid-containing chamber to force the fluid therein beneath the piston in' said grease-containing reservoir, and means to' control the communications between saidv grease-containing reservoir and said first named means, and said Huid-containing chamber and said second named means.

l0. A 'hydraulic grease dispensing device, comprising a. grease-containing, reservoir, a piston operable in said grease-containing reservoir, a` fluid-containing chamber, means communicating with 'said grease-containing reservoir to eject the grease therefrom under pressure, means communicating with said fluid-containing chamber to force the fluid therein beneath the piston in said grease containing reservoir, and a pair of valves to control the communications between said greasecontaining reservoir and said first nam-ed means, and said fluid-containing chamber 'and said second named means.

11. A hydraulic grease-dispensing device, comprising a, grease-containing reservoir, a piston operable in said grease-containing reservoir, a fluid-containing chamber, pumping means communicating with said greasecontaining reservoir to eject the grease therefrom under pressure, means communicating with sai-d fluid-containing chamber to force the Huid therein beneath the piston in said grease-containing reservoir, and a pair vof valves to control thev communications between said grease-containing reservoir and said first named means, land said fluid-containing chamber and saidfsecond named means.

l 152.v A hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston operable in said grease-containing reservoir, a fluid-containingchainber, an eccentricallyactuated grease pump communieating with said grease-containing reservoir to eject the grease therefrom under pressure, means communicating with said fluid-containing chamberto force the fluid therein beneath the piston in said grease-containing reservoir, anda pair of valves to control the communications between said grease-containing reservoir and said first named'fmeans, land said fluid-containing chamber and said second named means. j

13. hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston operable in said grease-containing reservoir, a fluid-containing chamber, means communicating with said grease-containing reservoir to eject the grease therefrom under pressure, vpumping. means communicating with saidL fluid-containing chamber to force the Huid therein beneath the piston in said grease-containin,( reservoir, and a pair of valves to control the communications between said grease-containing reservoir and said first named means, and said fluid-containing chamber and said second named means. y

14. A hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston operable in said grease-containing reservoir, a fluid-containing chamber, means communicating with saidV grease-containing reservoir to eject the grease therefrom under pressure, an eccentrically actuated fluid pump communicating with said` fluid-containing chamber to force `the fluid therein beneath the piston in said grease-containing reservoir, and a pair of valves to control the communications between said grease-containing reservoirfand said first named means, and said fluid-containing chamber and said second named means. Y

15. A hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston operable in said grease-containing reservoir, a uuid-containing chamber, pumping means communicating with said grease-containing reservoir to eject the grease therefrom under pressure, pumping means communicating with said fluid-containing cham-` ber to force th-e fluid ther-ein beneath the piston in said grease-containing reservoir, and a pair of valves to control the communications between said grease-containing reservoir and said first named means, and said fluid-containing chamber and said second named means. j v

16. hydraulic grease dispensing device, comprising a grease-containing reservoir, a piston operable in said grease containing reservoir, a fluid-containing chamber, pumping means communicating with said grease-containing reservoir to eject the grease therefrom under pressure, an eccentrically actuated fluid pump communicating with said fluid-containing chamberk to Vforce the fluid therein beneath the piston in said grease-con taining reservoir, and a pair of valves to control Athe communications between said greasecontaining reservoir and said first named,` means, and said fluid-containingA chamber and said second named means.

17. A hydraulic grease dispensing device, comprising a grease-,containingreservoir, a piston operable in said grease-containing reservoir, a fluid-containing chamber, means communicating with said grease-containing reservoir to eject the grease therefrom under pressure, means communicating with said fluid-containing chamber; to force the fluid therein beneath the piston in said grease-containing reservoir, a pair of valves to control the communications between said grease-containing reservoir and said first named means, and said fluid-containing `chamber and said second named means, and manually actuated means to simultaneously control said valves.

18. A hydraulic grease dispensing deyice,

comprising a grease-containing reservoir, a l piston operable in said grease-containing reservoir, a fluid-containing chamber, an eccenber to force the fluid therein beneath the pisi ton in said grease-containing reservoir, a pair of v alves to control the communications be-l tween said grease-containing reservoir and said first named means,'and said fluid-containing n chamber Vand said second named means, and manually actuated means to si-` Vmultaneously control said Valves.

In testimony, whereof, `I have signed my name to this specification this 3rd day of Aug.,1931."

A trically actuated grease pump communicati l ing with said grease containing reservoir to eject the grease therefrom under pressure, an eccentrically actuated Afiuid pump communi- Y Veating with said iiuid-containing chamber to force the fluid therein beneath the piston in' said grease-containing reservoir, a pair of valves to control the communications between v said grease-containing reservoir and said first 'named means, and said fluid-containing chamber and said second named means, and manually actuated means to simultaneously control said valves. A

19.`A hydraulic grease dispensing device, comprising a grease-containing reservoir, a

piston operable in said grease-containing reservoir, a fluid-containing chamber, means communicating .with said grease-containing reservoir to' eject the grease therefrom under pressure, an eccentrically actuated iuid pump communicating with said fluid-con-v taining chamber to force the fluid therein beneath the piston in said grease-containing reservoir, a pair ofpvalves to control the com' municationsbetween said grease-containing reservoir and said first named means and said fluid-containing chamber and said second named means, and manually actuated means to simultaneously control said valves.

20. A hydraulic grease dispensing device,l

ycomprising a grease-containing reservoir, a

piston operable in said greasercontaining reservoir, a fluid-containing chamber, pumping means communicating with said grease-com taining reservoir to eject the grease therefrom under pressure, pumping means communicating with said fluid-containing chamiis 

